What is MPPE?
MPPE stands forMicrosoftPoint-To-Point Encryption Protocol. As the name implies, MPPE is an end-to-end encryption scheme representing Point to Point Protocol (PPP) packets in an encrypted form. The functioning is rather simple: a client negotiates PPP with the ultimate tunnel terminator to initiate an encrypted session. PPP packets are then encrypted using the MPPE protocol prior to injection into the PPTP tunnel. Because the encrypted tunnel is end-to-end, interim tunnel switches do not have the ability to decrypt the packets.
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